NEHRP Clearinghouse
- Title
- Estimation of System Damping at the Lotung Site by Application of System Identification.
- File
- PB96214697.pdf
- Author(s)
- Glaser, S. D.; Leeds, A. L.
- Source
- National Inst. of Standards and Technology (BFRL), Gaithersburg, MD.; National Science Foundation, Arlington, VA., August 1996, 196 p.
- Abstract
- This report presents detailed system identification (SI) analyses of the full suite of seismic events at the Lotung site. Estimates of resonant frequencies and damping, and the dependence of these quantities on earthquake intensity is presented. The Lotung site is introduced in Chapter 2 through geological, seismological, and geotechnical descriptions. The SI precedures are discussed in detail in Chapter 3. Chapter 4 presents results of the system identification of the Lotung site data, with a discussion and conclusions given in Chapter 5. Appendix A describes the signal processing used on the raw data, with the integration procedure given in Appendix B. The pore water pressure time histories are shown in Appendix C. A literature review of damping values measured by other researchers is compiled in Appendix D. Finally, comparisons of actual interval outputs and modeled outputs for all events and intervals is given in Appendix E.
- Keywords
- Seismic waves; Liquefaction; Displacement; Soil structure interactions; Nonlinearity; Nuclear power plants; Excitation; Vibration damping; Soil mechanics; Earthquake resistant structures; Lotung (Taiwan); Site characterization; Graphs (Charts); Stiffness; Structure response; Soil profiles; Seismic effects; Ground motion; Earthquake engineering; System identification; Earthquake magnitude; Earthquakes